217657_0_17859.cpp:4: error: `main' must return `int'
217657_0_17859.cpp: In function `int main(...)':
217657_0_17859.cpp:8: error: `f1' undeclared (first use this function)
217657_0_17859.cpp:8: error: (Each undeclared identifier is reported only once for each function it appears in.)
217657_0_17859.cpp:9: error: `i' undeclared (first use this function)
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